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Students with poor spatial abilities experience a barrier to academic success early in the STEM curriculum. However, Sorby et al. report that even brief training can improve spatial reasoning in students who lack them. Further, the National Research Council recommends that spatial thinking skills be taught at all educational levels. Halpern defines spatial ability as a heterogeneous cluster of cognitive skills. "Mental rotation" and "orthographic projection" are two of these skills. Mental rotation is the capacity to mentally rotate a two- or three-dimensional object. The orthographic projection skill is the ability to represent three-dimensional objects in two dimensions. These skills are important across the STEM curriculum, and in physics and astronomy these skills have particular relevance.

Introduction: Hemorrhagic cystitis (HC) is a morbid condition for patients and can be challenging for urologists to manage. There are many potential contributing etiologies and the severity of bleeding can be variable. It is important to consider each clinical scenario when formulating management strategies in order to provide the highest quality of care to patients. We provide a review of the literature including diagnosis and treatment options., Materials and Methods: We performed a literature search on PubMed using the following keywords: hemorrhagic cystitis, cystitis, gross hematuria, intractable hematuria. We considered all available published articles with no specific inclusion or exclusion criteria for the purposes of this review., Results: We reviewed a total of 41 articles and identified a broad differential diagnosis for intractable hemorrhagic cystitis including infection, chemical exposure, malignancy, nephropathy, trauma, radiation therapy, and idiopathic etiology. Depending on the severity of bleeding, many treatments have been described. These range from conservative strategies (bladder fulguration and continuous irrigation) to more extreme and morbid therapies (intravesical instillations, embolization, and urinary diversion)., Conclusion: Hemorrhagic cystitis is a relatively common and can be a difficult condition to manage for urologists. It is important to understand the etiology and available treatments options in order to best treat our patients. We provide a comprehensive and thorough review of the literature and propose a stepwise treatment approach.